Heater



FIG. 1 is a left, rear, top perspective view of a heater in accordance with the present invention;

FIG. 2 is an elevation view of the left side thereof;

FIG. 3 is an elevation view of the right side thereof;

FIG. 4 is an elevation view of the rear thereof;

FIG. 5 is an elevation view of the front thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is an enlarged view of the disclaimed grill pattern indicated in FIG. 1.

The broken lines shown in the drawings are for purposes of illustrating portions of the article and form no part of the claimed design. 

CLAIM The ornamental design for a heater, as shown and described. 